feat(docker): Add Docker configuration for clangd-based C/C++ LSP servers

docker/lsp/clangd/Dockerfile

@@ -0,0 +1,25 @@
+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