Add dev container

.devcontainer/Dockerfile

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+# Base image
+ARG VARIANT=bookworm-slim
+FROM debian:${VARIANT}
+ENV DEBIAN_FRONTEND=noninteractive
+ENV LC_ALL=C.UTF-8
+ENV LANG=C.UTF-8
+
+# Arguments
+ARG CONTAINER_USER=esp
+ARG CONTAINER_GROUP=esp
+
+# Install dependencies
+RUN apt-get update \
+    && apt-get install -y git curl build-essential \
+        libudev-dev librust-libudev-sys-dev pkg-config
+
+# Set users
+RUN adduser --disabled-password --gecos "" ${CONTAINER_USER}
+USER ${CONTAINER_USER}
+WORKDIR /home/${CONTAINER_USER}
+
+# Install rustup
+RUN curl --proto '=https' --tlsv1.2 -sSf https://sh.rustup.rs | sh -s -- \
+    --default-toolchain none -y --profile minimal
+
+# Update envs
+ENV PATH=${PATH}:/home/${CONTAINER_USER}/.cargo/bin
+
+# Set default toolchain
+RUN rustup default stable
+RUN rustup component add rustfmt
+
+EXPOSE 8000
+
+CMD [ "/bin/bash" ]

.devcontainer/devcontainer.json

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+// For format details, see https://aka.ms/devcontainer.json. For config options, see the
+// README at: https://github.com/devcontainers/templates/tree/main/src/debian
+{
+	"name": "esp_web_flash_server",
+	"build": {
+		"dockerfile": "Dockerfile",
+		"args": {
+			"CONTAINER_USER": "esp",
+			"CONTAINER_GROUP": "esp",
+			"ESP_BOARD": "esp32s3"
+		}
+	},
+	"forwardPorts": [
+		8000
+	],
+	"workspaceMount": "source=${localWorkspaceFolder},target=/home/esp/esp_web_flash_server,type=bind,consistency=cached",
+	"workspaceFolder": "/home/esp/esp_web_flash_server",
+	"mounts": [
+		"source=${localEnv:HOME}/.ssh,target=/home/esp/.ssh,type=bind,consistency=cached"
+	],
+	"customizations": {
+		"vscode": {
+			"extensions": [
+				"rust-lang.rust-analyzer",
+				"tamasfe.even-better-toml",
+				"fill-labs.dependi"
+			]
+		}
+	}
+}