Update Dockerfile and entrypoint for enhanced development tools and configuration

Update Dockerfile to include clangd, replace npm packages with pyright and typescript-language-server, add GOPATH and GOBIN environment variables, and improve user creation. Update docker-entrypoint.sh to export environment variables, configure opencode.json, and set up MCP language server with proper configuration files.

Dockerfile

@@ -1,7 +1,7 @@
 FROM debian:bookworm-slim
 
 RUN apt-get update && apt-get install -y \
-    clang llvm-dev libclang-dev pkg-config build-essential git make curl nodejs npm \
+    clang clangd llvm-dev libclang-dev pkg-config build-essential git make curl nodejs npm \
     pylint black flake8 mypy isort logrotate sudo cmake libicu-dev zlib1g-dev \
     libcurl4-openssl-dev libssl-dev ruby-dev jq python3 python3-pip golang-go rustc cargo \
     r-base sqlite3 wget bash zsh libgit2-dev \
@@ -22,7 +22,7 @@ RUN curl https://sh.rustup.rs -sSf | sh -s -- -y --default-toolchain stable && \
     rustup component add rustfmt clippy rust-src rust-docs && \
     cargo install cargo-edit cargo-watch cargo-outdated cargo-make cargo-binstall
 
-RUN npm install -g typescript tsc @types/node eslint prettier
+RUN npm install -g typescript tsc @types/node eslint prettier pyright typescript-language-server
 
 RUN cargo binstall --strategies crate-meta-data jj-cli
 
@@ -36,17 +36,19 @@ RUN curl -fsSL https://opencode.ai/install | bash && \
     mkdir -p /root/.config/opencode && \
     mv /root/.opencode/bin/opencode /usr/local/bin/
 
-COPY opt/bin/ /opt/bin/
-COPY opt/dev-tools/ /opt/dev-tools/
-COPY opt/lm-client/ /opt/lm-client/
-
-ENV PATH="/opt/bin:/opt/dev-tools:/opt/lm-client:${PATH}"
+ENV GOPATH=/usr/local/go
+ENV GOBIN=/usr/local/go/bin
+RUN go install golang.org/x/tools/gopls@latest
+RUN go install github.com/isaacphi/mcp-language-server@latest
 
 ARG USERNAME=devuser
 ARG USER_UID=1000
 ARG USER_GID=1000
 RUN groupadd --gid $USER_GID $USERNAME && \
-    useradd --uid $USER_UID --gid $USER_GID -m $USERNAME
+    useradd --uid $USER_UID \
+            --gid $USER_GID \
+            -m $USERNAME \
+            --shell /bin/bash
 
 COPY docker-entrypoint.sh /usr/local/bin/entrypoint.sh
 RUN chmod +x /usr/local/bin/entrypoint.sh