feat: support dev container.

.devcontainer/.env

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+POSTGRES_USER=postgres
+POSTGRES_PASSWORD=postgres
+POSTGRES_DB=postgres
+POSTGRES_HOSTNAME=localhost
+
+COMMENTO_ORIGIN=http://localhost:8080
+COMMENTO_PORT=8080
+COMMENTO_POSTGRES=postgres://postgres:postgres@db:5432/postgres?sslmode=disable

.devcontainer/Dockerfile

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+# [Choice] Go version (use -bullseye variants on local arm64/Apple Silicon): 1, 1.18, 1.17, 1-bullseye, 1.18-bullseye, 1.17-bullseye, 1-buster, 1.18-buster, 1.17-buster
+ARG VARIANT=1-bullseye
+FROM mcr.microsoft.com/vscode/devcontainers/go:0-${VARIANT}
+
+# [Choice] Node.js version: none, lts/*, 16, 14, 12, 10
+ARG NODE_VERSION="none"
+RUN if [ "${NODE_VERSION}" != "none" ]; then su vscode -c "umask 0002 && . /usr/local/share/nvm/nvm.sh && nvm install ${NODE_VERSION} 2>&1"; fi
+
+# [Optional] Uncomment this section to install additional OS packages.
+RUN apt-get update && export DEBIAN_FRONTEND=noninteractive \
+    && apt-get -y install --no-install-recommends inotify-tools
+
+# [Optional] Uncomment the next lines to use go get to install anything else you need
+# USER vscode
+# RUN go get -x <your-dependency-or-tool>
+# USER root
+
+# [Optional] Uncomment this line to install global node packages.
+# RUN su vscode -c "source /usr/local/share/nvm/nvm.sh && npm install -g <your-package-here>" 2>&1

.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/microsoft/vscode-dev-containers/tree/v0.245.2/containers/go-postgres
+{
+	"name": "Go & PostgreSQL",
+	"dockerComposeFile": "docker-compose.yml",
+	"service": "app",
+	"workspaceFolder": "/workspace",
+
+	// Configure tool-specific properties.
+	"customizations": {
+		// Configure properties specific to VS Code.
+		"vscode": {
+			// Set *default* container specific settings.json values on container create.
+			"settings": {
+				"go.toolsManagement.checkForUpdates": "local",
+				"go.useLanguageServer": true,
+				"go.gopath": "/go",
+				"go.goroot": "/usr/local/go"
+			},
+
+			// Add the IDs of extensions you want installed when the container is created.
+			"extensions": [
+				"golang.Go",
+				"ms-vscode.makefile-tools",
+				"donjayamanne.githistory",
+				"eamodio.gitlens",
+				"mhutchie.git-graph"
+			]
+		}
+	},
+
+	// Use 'forwardPorts' to make a list of ports inside the container available locally.
+	"forwardPorts": [5432],
+
+	// Use 'postCreateCommand' to run commands after the container is created.
+	// "postCreateCommand": "go version",
+
+	// Comment out to connect as root instead. More info: https://aka.ms/vscode-remote/containers/non-root.
+	"remoteUser": "vscode",
+	"features": {
+		"git": "os-provided",
+		"git-lfs": "latest"
+	}
+}

.devcontainer/docker-compose.yml

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+version: '3.8'
+
+volumes:
+  postgres-data:
+
+
+services:
+  app:
+    build:
+      context: .
+      dockerfile: Dockerfile
+      args:
+        # [Choice] Go version 1, 1.18, 1.17
+        # Append -bullseye or -buster to pin to an OS version.
+        # Use -bullseye variants on local arm64/Apple Silicon.
+        VARIANT: 1-bullseye
+        # Options
+        NODE_VERSION: "lts/*"
+    env_file:
+      # Ensure that the variables in .env match the same variables in devcontainer.json
+      - .env
+
+    # Security Opt and cap_add allow for C++ based debuggers to work. 
+    # See `runArgs`: https://github.com/Microsoft/vscode-docs/blob/main/docs/remote/devcontainerjson-reference.md
+    #     security_opt:
+    #       - seccomp:unconfined
+    #     cap_add:
+    #       - SYS_PTRACE
+
+    volumes:
+      - ..:/workspace:cached
+
+    # Overrides default command so things don't shut down after the process ends.
+    command: sleep infinity
+
+    # Runs app on the same network as the database container, allows "forwardPorts" in devcontainer.json function.
+    network_mode: service:db
+    # Uncomment the next line to use a non-root user for all processes.
+    # user: vscode
+
+    # Use "forwardPorts" in **devcontainer.json** to forward an app port locally. 
+    # (Adding the "ports" property to this file will not forward from a Codespace.)
+
+  db:
+    image: postgres:13
+    restart: unless-stopped
+    volumes:
+      - postgres-data:/var/lib/postgresql/data
+    env_file:
+      # Ensure that the variables in .env match the same variables in devcontainer.json
+      - .env
+    # Add "forwardPorts": ["5432"] to **devcontainer.json** to forward PostgreSQL locally.
+    # (Adding the "ports" property to this file will not forward from a Codespace.)