feat: add 4 final-tractable Selkies images (zen, cura, shotcut, prismlauncher)

images/cura-selkies/Dockerfile

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+# StreamSpace UltiMaker Cura with Selkies-GStreamer (WebRTC)
+#
+# UltiMaker Cura is a 3D-printer slicer — joins our existing trio
+# (PrusaSlicer, Bambu Studio, OrcaSlicer). Distributed as AppImage
+# from Ultimaker/Cura GitHub releases.
+
+FROM ghcr.io/streamspace-dev/selkies-base:latest
+
+LABEL org.opencontainers.image.title="StreamSpace UltiMaker Cura"
+LABEL org.opencontainers.image.description="UltiMaker Cura 3D-printer slicer with Selkies-GStreamer (WebRTC) streaming for StreamSpace"
+LABEL org.opencontainers.image.version="1.0.0"
+LABEL org.opencontainers.image.vendor="StreamSpace"
+LABEL org.opencontainers.image.source="https://github.com/streamspace-dev/streamspace-templates"
+
+USER root
+ARG DEBIAN_FRONTEND=noninteractive
+
+RUN set -eux; \
+    img_url="$(curl -fsSL https://api.github.com/repos/Ultimaker/Cura/releases/latest \
+        | jq -r '.assets[] | select(.name | test("^UltiMaker-Cura-.*-linux-X64\\.AppImage$")) | .browser_download_url' \
+        | head -1)"; \
+    if [ -z "${img_url}" ]; then echo "Could not resolve Cura AppImage URL" >&2; exit 1; fi; \
+    cd /tmp; \
+    curl -fsSL -o cura.AppImage "${img_url}"; \
+    chmod +x cura.AppImage; \
+    ./cura.AppImage --appimage-extract >/dev/null; \
+    if [ -d squashfs-root ] && [ ! -L squashfs-root ]; then \
+        mv squashfs-root /opt/cura; \
+    else \
+        mv AppDir /opt/cura; \
+    fi; \
+    rm -rf cura.AppImage AppDir squashfs-root
+
+USER user
+CMD ["/opt/cura/AppRun"]

images/cura-selkies/PLATFORMS

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+linux/amd64

images/prismlauncher-selkies/Dockerfile

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+# StreamSpace PrismLauncher with Selkies-GStreamer (WebRTC)
+#
+# PrismLauncher is the community-maintained Minecraft launcher
+# (continuation of MultiMC). Manages multiple instances, mod loaders
+# (Forge/Fabric/Quilt/NeoForge), accounts (Microsoft/offline), and
+# resource packs. AppImage from PrismLauncher/PrismLauncher GitHub
+# releases.
+
+FROM ghcr.io/streamspace-dev/selkies-base:latest
+
+LABEL org.opencontainers.image.title="StreamSpace PrismLauncher"
+LABEL org.opencontainers.image.description="PrismLauncher Minecraft launcher with Selkies-GStreamer (WebRTC) streaming for StreamSpace"
+LABEL org.opencontainers.image.version="1.0.0"
+LABEL org.opencontainers.image.vendor="StreamSpace"
+LABEL org.opencontainers.image.source="https://github.com/streamspace-dev/streamspace-templates"
+
+USER root
+ARG DEBIAN_FRONTEND=noninteractive
+
+# OpenJDK runtime — Minecraft needs Java 17+ for modern versions.
+# PrismLauncher's AppImage doesn't bundle a JRE; users typically
+# install one via the launcher itself, but pre-installing avoids the
+# first-launch delay.
+RUN set -eux; \
+    apt-get update && apt-get install -y --no-install-recommends openjdk-21-jre; \
+    img_url="$(curl -fsSL https://api.github.com/repos/PrismLauncher/PrismLauncher/releases/latest \
+        | jq -r '.assets[] | select(.name == "PrismLauncher-Linux-x86_64.AppImage") | .browser_download_url' \
+        | head -1)"; \
+    if [ -z "${img_url}" ]; then echo "Could not resolve PrismLauncher AppImage URL" >&2; exit 1; fi; \
+    cd /tmp; \
+    curl -fsSL -o prismlauncher.AppImage "${img_url}"; \
+    chmod +x prismlauncher.AppImage; \
+    ./prismlauncher.AppImage --appimage-extract >/dev/null; \
+    if [ -d squashfs-root ] && [ ! -L squashfs-root ]; then \
+        mv squashfs-root /opt/prismlauncher; \
+    else \
+        mv AppDir /opt/prismlauncher; \
+    fi; \
+    rm -rf prismlauncher.AppImage AppDir squashfs-root; \
+    apt-get clean && rm -rf /var/lib/apt/lists/*
+
+USER user
+CMD ["/opt/prismlauncher/AppRun"]

images/prismlauncher-selkies/PLATFORMS

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+linux/amd64

images/shotcut-selkies/Dockerfile

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+# StreamSpace Shotcut with Selkies-GStreamer (WebRTC)
+#
+# Shotcut is a cross-platform non-linear video editor (joins
+# kdenlive-selkies / openshot-selkies). Distributed as AppImage from
+# mltframework/shotcut GitHub releases.
+
+FROM ghcr.io/streamspace-dev/selkies-base:latest
+
+LABEL org.opencontainers.image.title="StreamSpace Shotcut"
+LABEL org.opencontainers.image.description="Shotcut video editor with Selkies-GStreamer (WebRTC) streaming for StreamSpace"
+LABEL org.opencontainers.image.version="1.0.0"
+LABEL org.opencontainers.image.vendor="StreamSpace"
+LABEL org.opencontainers.image.source="https://github.com/streamspace-dev/streamspace-templates"
+
+USER root
+ARG DEBIAN_FRONTEND=noninteractive
+
+RUN set -eux; \
+    img_url="$(curl -fsSL https://api.github.com/repos/mltframework/shotcut/releases/latest \
+        | jq -r '.assets[] | select(.name | test("^shotcut-linux-x86_64-.*\\.AppImage$")) | .browser_download_url' \
+        | head -1)"; \
+    if [ -z "${img_url}" ]; then echo "Could not resolve Shotcut AppImage URL" >&2; exit 1; fi; \
+    cd /tmp; \
+    curl -fsSL -o shotcut.AppImage "${img_url}"; \
+    chmod +x shotcut.AppImage; \
+    ./shotcut.AppImage --appimage-extract >/dev/null; \
+    if [ -d squashfs-root ] && [ ! -L squashfs-root ]; then \
+        mv squashfs-root /opt/shotcut; \
+    else \
+        mv AppDir /opt/shotcut; \
+    fi; \
+    rm -rf shotcut.AppImage AppDir squashfs-root
+
+USER user
+CMD ["/opt/shotcut/AppRun"]

images/shotcut-selkies/PLATFORMS

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+linux/amd64

images/zen-selkies/Dockerfile

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+# StreamSpace Zen Browser with Selkies-GStreamer (WebRTC)
+#
+# Zen Browser is a Firefox fork focused on workflow features
+# (workspaces, vertical tabs, split view, glance preview). Distributed
+# as self-contained tar.xz from zen-browser/desktop GitHub releases —
+# Firefox-based runtime is bundled.
+
+FROM ghcr.io/streamspace-dev/selkies-base:latest
+
+LABEL org.opencontainers.image.title="StreamSpace Zen Browser"
+LABEL org.opencontainers.image.description="Zen Browser (Firefox fork with workspaces/vertical tabs) with Selkies-GStreamer (WebRTC) streaming for StreamSpace"
+LABEL org.opencontainers.image.version="1.0.0"
+LABEL org.opencontainers.image.vendor="StreamSpace"
+LABEL org.opencontainers.image.source="https://github.com/streamspace-dev/streamspace-templates"
+
+USER root
+ARG DEBIAN_FRONTEND=noninteractive
+
+RUN set -eux; \
+    apt-get update && apt-get install -y --no-install-recommends xz-utils; \
+    tar_url="$(curl -fsSL https://api.github.com/repos/zen-browser/desktop/releases/latest \
+        | jq -r '.assets[] | select(.name == "zen.linux-x86_64.tar.xz") | .browser_download_url' \
+        | head -1)"; \
+    if [ -z "${tar_url}" ]; then echo "Could not resolve Zen Browser tar.xz URL" >&2; exit 1; fi; \
+    curl -fsSL -o /tmp/zen.tar.xz "${tar_url}"; \
+    install -d -m 0755 /opt; \
+    tar xJf /tmp/zen.tar.xz -C /opt; \
+    rm -f /tmp/zen.tar.xz; \
+    ln -s /opt/zen/zen /usr/local/bin/zen; \
+    apt-get clean && rm -rf /var/lib/apt/lists/*
+
+USER user
+CMD ["zen"]

images/zen-selkies/PLATFORMS

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+linux/amd64

selkies/cura-selkies.yaml

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+apiVersion: stream.space/v1alpha1
+kind: Template
+metadata:
+  name: cura-selkies
+  namespace: workspaces
+  labels:
+    app.kubernetes.io/name: cura-selkies
+    app.kubernetes.io/component: template
+    streamspace.io/category: design-graphics
+    streamspace.io/streaming-protocol: selkies
+  annotations:
+    streamspace.dev/image-status: published
+spec:
+  displayName: UltiMaker Cura
+  description: UltiMaker Cura 3D-printer slicer streamed via Selkies-GStreamer (WebRTC).
+  category: Design & Graphics
+  icon: https://raw.githubusercontent.com/streamspace-dev/streamspace/main/ui/public/icons/cura.svg
+  baseImage: ghcr.io/streamspace-dev/cura-selkies:latest
+  streamingProtocol: selkies
+  defaultResources:
+    requests:
+      memory: 4Gi
+      cpu: 2000m
+    limits:
+      memory: 8Gi
+      cpu: 4000m
+  ports:
+  - name: selkies
+    containerPort: 8080
+    protocol: TCP
+  env:
+  - name: TZ
+    value: UTC
+  - name: DISPLAY_SIZEW
+    value: '1920'
+  - name: DISPLAY_SIZEH
+    value: '1080'
+  - name: SELKIES_ENABLE_AUDIO
+    value: 'false'
+  capabilities:
+  - Network
+  - Clipboard
+  tags:
+  - design
+  - 3d-printing
+  - slicer
+  - cura
+  - ultimaker
+  - selkies

selkies/prismlauncher-selkies.yaml

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+apiVersion: stream.space/v1alpha1
+kind: Template
+metadata:
+  name: prismlauncher-selkies
+  namespace: workspaces
+  labels:
+    app.kubernetes.io/name: prismlauncher-selkies
+    app.kubernetes.io/component: template
+    streamspace.io/category: gaming
+    streamspace.io/streaming-protocol: selkies
+  annotations:
+    streamspace.dev/image-status: published
+spec:
+  displayName: PrismLauncher
+  description: PrismLauncher Minecraft launcher (multi-instance, Forge/Fabric/Quilt/NeoForge mod loaders, Microsoft + offline accounts) streamed via Selkies-GStreamer (WebRTC).
+  category: Gaming
+  icon: https://raw.githubusercontent.com/streamspace-dev/streamspace/main/ui/public/icons/prismlauncher.svg
+  baseImage: ghcr.io/streamspace-dev/prismlauncher-selkies:latest
+  streamingProtocol: selkies
+  defaultResources:
+    requests:
+      memory: 4Gi
+      cpu: 2000m
+    limits:
+      memory: 8Gi
+      cpu: 4000m
+  ports:
+  - name: selkies
+    containerPort: 8080
+    protocol: TCP
+  env:
+  - name: TZ
+    value: UTC
+  - name: DISPLAY_SIZEW
+    value: '1920'
+  - name: DISPLAY_SIZEH
+    value: '1080'
+  - name: SELKIES_ENABLE_AUDIO
+    value: 'true'
+  capabilities:
+  - Network
+  - Audio
+  - Clipboard
+  tags:
+  - gaming
+  - minecraft
+  - launcher
+  - prismlauncher
+  - selkies