refactor(devcontainer): streamline Dockerfile and update VS Code settings for Clang 12

.devcontainer/Dockerfile

@@ -3,33 +3,15 @@ FROM ubuntu:22.04
 # Set environment variables for non-interactive installation
 ENV DEBIAN_FRONTEND=noninteractive
 
-# Install essential development tools
+# Install development tools in one layer
 RUN apt-get update && apt-get install -y \
     # Build essentials
     build-essential \
-    # Add LLVM repository for specific Clang versions
-    wget \
-    lsb-release \
-    software-properties-common \
-    gnupg \
-    && rm -rf /var/lib/apt/lists/*
-
-# Install development tools - Ubuntu 22.04 approach
-RUN apt-get update && apt-get install -y \
-    # Build essentials
-    build-essential \
-    # Check what Clang versions are available and install Clang 12 if possible
-    software-properties-common \
-    wget \
-    gnupg \
-    && apt-get update && \
-    # Install available Clang tools (Ubuntu 22.04 has clang-12 available)
-    apt-get install -y \
+    # Clang 12 toolchain
     clang-12 \
     clang++-12 \
     clang-format-12 \
     clang-tidy-12 \
-    # clangd and lldb may have different versioning
     clangd \
     lldb \
     # Build tools
@@ -56,13 +38,13 @@ RUN apt-get update && apt-get install -y \
     # Clean up
     && rm -rf /var/lib/apt/lists/*
 
-# Create symbolic links to make clang-12 the default
+# Set up Clang 12 alternatives
 RUN update-alternatives --install /usr/bin/clang clang /usr/bin/clang-12 100 \
     && update-alternatives --install /usr/bin/clang++ clang++ /usr/bin/clang++-12 100 \
     && update-alternatives --install /usr/bin/clang-format clang-format /usr/bin/clang-format-12 100 \
     && update-alternatives --install /usr/bin/clang-tidy clang-tidy /usr/bin/clang-tidy-12 100
 
-# Create a non-root user for development
+# Create non-root user
 RUN groupadd --gid 1000 vscode \
     && useradd --uid 1000 --gid vscode --shell /bin/bash --create-home vscode \
     && apt-get update \
@@ -71,7 +53,7 @@ RUN groupadd --gid 1000 vscode \
     && chmod 0440 /etc/sudoers.d/vscode \
     && rm -rf /var/lib/apt/lists/*
 
-# Set clang-12 as the default compiler
+# Set environment variables
 ENV CC=clang-12
 ENV CXX=clang++-12
 

.devcontainer/devcontainer.json

@@ -20,12 +20,12 @@
             
             // Container-specific VS Code settings
             "settings": {
-                "C_Cpp.default.compilerPath": "/usr/bin/clang++",
+                "C_Cpp.default.compilerPath": "/usr/bin/clang++-12",
                 "C_Cpp.default.cStandard": "c17",
                 "C_Cpp.default.cppStandard": "c++20",
                 "C_Cpp.default.intelliSenseMode": "linux-clang-x64",
                 "cmake.configureOnOpen": false,
-                "clang-format.executable": "/usr/bin/clang-format",
+                "clang-format.executable": "/usr/bin/clang-format-12",
                 "editor.formatOnSave": true,
                 "[cpp]": {
                     "editor.defaultFormatter": "xaver.clang-format"
@@ -36,27 +36,15 @@
                 "files.associations": {
                     "*.hpp": "cpp",
                     "*.tpp": "cpp"
-                },
-                "vscode" : {
-                    "settings" : {
-                        "remote.SSH.forwardAgent": true
                 }
             }
-
-            }
         }
     },
 
     // Container configuration
-    "workspaceFolder": "/workspace",
-    "workspaceMount": "source=${localWorkspaceFolder},target=/workspace,type=bind,consistency=cached",
-    
-    // Development user setup
+    // "workspaceFolder": "/workspace",
     "remoteUser": "vscode",
     
-    // Container lifecycle hooks
-    "postCreateCommand": "echo 'Container ready for C++ development!'",
-    
     // Port forwarding for web server testing
     "forwardPorts": [8080, 3000],
     "portsAttributes": {
@@ -70,18 +58,12 @@
         }
     },
     
-    // Container features
+    // Additional dev container features (SSH agent removed)
     "features": {
         "ghcr.io/devcontainers/features/git:1": {},
-        "ghcr.io/devcontainers/features/github-cli:1": {},
-        "ghcr.io/devcontainers/features/sshd:1": {
-            "version": "latest",
-            "forwardPorts": [22]
-        }
+        "ghcr.io/devcontainers/features/github-cli:1": {}
     },
     
-    // Mount points for better performance
-    "mounts": [
-        "source=webserv-node_modules,target=${containerWorkspaceFolder}/node_modules,type=volume"
-    ]
+    // Simple post-create setup
+    "postCreateCommand": "echo 'Dev container ready! Use GitHub CLI (gh auth login) or configure Git with HTTPS for GitHub access.'"
 }