feat: add Docker configuration for PostgreSQL and Gitea services with clangd support

docker/.gitignore

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+.env

docker/compose.yml

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+volumes:
+  postgres:
+    driver: local
+  gitea:
+    driver: local
+
+services:
+  postgres:
+    image: docker.io/library/postgres:14
+    container_name: postgres
+    restart: always
+    environment:
+      - POSTGRES_USER=${POSTGRES_USER}
+      - POSTGRES_PASSWORD=${POSTGRES_PASSWORD}
+      - POSTGRES_DB=${POSTGRES_DB}
+    volumes:
+      - postgres:/var/lib/postgresql/data
+    ports:
+      - "5432:5432"
+    healthcheck:
+      test: [ "CMD-SHELL", "pg_isready -U ${POSTGRES_USER} -d ${POSTGRES_DB}" ]
+      interval: 5s
+      timeout: 5s
+      retries: 5
+      start_period: 5s
+
+  gitea:
+    image: docker.io/gitea/gitea:1.22.6
+    container_name: gitea
+    restart: always
+    environment:
+      - GITEA__database__DB_TYPE=postgres
+      - GITEA__database__HOST=postgres:5432
+      - GITEA__database__NAME=${POSTGRES_DB}
+      - GITEA__database__USER=${POSTGRES_USER}
+      - GITEA__database__PASSWD=${POSTGRES_PASSWORD}
+    volumes:
+      - gitea:/data
+      - /etc/timezone:/etc/timezone:ro
+      - /etc/localtime:/etc/localtime:ro
+    ports:
+      - "3000:3000"
+      - "22:22"
+    depends_on:
+      postgres:
+        condition: service_healthy
+
+  lsp-c:
+    image: clangd:latest
+    build:
+      context: ./lsp/clangd
+      dockerfile: Dockerfile
+    container_name: lsp-c
+    restart: always
+    ports:
+      - "30001:3000"
+
+  lsp-cpp:
+    image: clangd:latest
+    build:
+      context: ./lsp/clangd
+      dockerfile: Dockerfile
+    container_name: lsp-cpp
+    restart: always
+    ports:
+      - "30002:3000"

docker/lsp/clangd/Dockerfile

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+FROM alpine:latest as builder
+
+RUN apk add --no-cache git npm
+
+WORKDIR /app
+
+RUN git clone https://github.com/wylieconlon/jsonrpc-ws-proxy.git
+
+WORKDIR /app/jsonrpc-ws-proxy
+
+COPY servers.yml .
+
+RUN npm install && npm run prepare
+
+FROM alpine:latest
+
+RUN apk add --no-cache build-base clang-extra-tools nodejs
+
+WORKDIR /app/jsonrpc-ws-proxy
+
+COPY --from=builder /app/jsonrpc-ws-proxy .
+
+EXPOSE 3000
+
+CMD ["node", "dist/server.js", "--port", "3000", "--languageServers", "servers.yml"]

docker/lsp/clangd/servers.yml

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+langservers:
+  clangd:
+    - /usr/bin/clangd
+    - --log=verbose
+    - --background-index