feat: add entrypoint script for Carbon Web Server configuration and startup

.gitignore

@@ -58,5 +58,4 @@ ssl/*
 !.github/workflows/
 src/bin
 docker-push.sh
-entrypoint.sh
 .idea

entrypoint.sh

@@ -0,0 +1,147 @@
+#!/bin/sh
+set -e
+
+# Carbon Web Server - Docker Entrypoint Script
+# This script handles configuration and startup of the Carbon server
+
+CONFIG_FILE="/app/server.conf"
+
+# Helper: normalize boolean env vars (true/false/yes/no/1/0 -> true/false)
+normalize_bool() {
+    case "$(echo "$1" | tr '[:upper:]' '[:lower:]')" in
+        true|yes|on|1) echo "true" ;;
+        *) echo "false" ;;
+    esac
+}
+
+# Normalize environment variables
+USE_HTTPS=$(normalize_bool "${USE_HTTPS:-false}")
+ENABLE_HTTP2=$(normalize_bool "${ENABLE_HTTP2:-false}")
+ENABLE_WEBSOCKET=$(normalize_bool "${ENABLE_WEBSOCKET:-false}")
+
+# Validate configuration constraints
+validate_config() {
+    # HTTP/2 requires HTTPS
+    if [ "$ENABLE_HTTP2" = "true" ] && [ "$USE_HTTPS" != "true" ]; then
+        echo "ERROR: HTTP/2 requires HTTPS to be enabled"
+        echo "Set USE_HTTPS=true or disable HTTP/2 with ENABLE_HTTP2=false"
+        exit 1
+    fi
+}
+
+# Generate server.conf from environment variables
+generate_config() {
+    # Skip generation if user mounted a custom config and KEEP_CONFIG is set
+    if [ -f "$CONFIG_FILE" ] && [ "${KEEP_CONFIG:-false}" = "true" ]; then
+        echo "Using existing server.conf (KEEP_CONFIG=true)"
+        return 0
+    fi
+
+    echo "Generating server.conf from environment variables..."
+    cat > "$CONFIG_FILE" << EOF
+# Carbon Web Server Configuration (Auto-generated)
+# Generated at: $(date -u +"%Y-%m-%d %H:%M:%S UTC")
+
+running = true
+
+# Network configuration
+port = ${PORT:-8080}
+use_https = ${USE_HTTPS}
+enable_http2 = ${ENABLE_HTTP2}
+enable_websocket = ${ENABLE_WEBSOCKET}
+server_name = ${SERVER_NAME:-0.0.0.0}
+
+# Performance configuration
+max_threads = ${MAX_THREADS:-4}
+max_connections = ${MAX_CONNECTIONS:-1024}
+
+# Logging configuration
+log_file = /app/log/server.log
+log_mode = ${LOG_MODE:-classic}
+
+# Path configuration
+www_path = /app/www
+
+# SSL configuration (if HTTPS enabled)
+ssl_cert_path = ${SSL_CERT_PATH:-/app/ssl/cert/cert.pem}
+ssl_key_path = ${SSL_KEY_PATH:-/app/ssl/key/key.key}
+EOF
+
+    if [ $? -ne 0 ]; then
+        echo "ERROR: Failed to write configuration file"
+        exit 1
+    fi
+}
+
+# Validate SSL certificates if HTTPS is enabled
+validate_ssl() {
+    if [ "$USE_HTTPS" = "true" ]; then
+        CERT_PATH="${SSL_CERT_PATH:-/app/ssl/cert/cert.pem}"
+        KEY_PATH="${SSL_KEY_PATH:-/app/ssl/key/key.key}"
+
+        if [ ! -f "$CERT_PATH" ]; then
+            echo "ERROR: SSL certificate not found at $CERT_PATH"
+            echo "Please mount your SSL certificate or set SSL_CERT_PATH"
+            exit 1
+        fi
+
+        if [ ! -r "$CERT_PATH" ]; then
+            echo "ERROR: SSL certificate at $CERT_PATH is not readable"
+            exit 1
+        fi
+
+        if [ ! -f "$KEY_PATH" ]; then
+            echo "ERROR: SSL key not found at $KEY_PATH"
+            echo "Please mount your SSL key or set SSL_KEY_PATH"
+            exit 1
+        fi
+
+        if [ ! -r "$KEY_PATH" ]; then
+            echo "ERROR: SSL key at $KEY_PATH is not readable"
+            exit 1
+        fi
+
+        echo "SSL certificates validated successfully"
+    fi
+}
+
+# Create necessary directories
+setup_directories() {
+    mkdir -p /app/log 2>/dev/null || true
+    mkdir -p /app/www 2>/dev/null || true
+}
+
+# Print startup banner
+print_banner() {
+    echo "========================================"
+    echo " Carbon Web Server"
+    echo "========================================"
+    echo " Port:       ${PORT:-8080}"
+    echo " HTTPS:      ${USE_HTTPS}"
+    echo " HTTP/2:     ${ENABLE_HTTP2}"
+    echo " WebSocket:  ${ENABLE_WEBSOCKET}"
+    echo " Log Mode:   ${LOG_MODE:-classic}"
+    echo "========================================"
+}
+
+# Main entry point
+main() {
+    setup_directories
+    validate_config
+    generate_config
+    validate_ssl
+    print_banner
+
+    # Verify server binary exists and is executable
+    if [ ! -x /app/server ]; then
+        echo "ERROR: Server binary not found or not executable at /app/server"
+        exit 1
+    fi
+
+    echo "Starting Carbon server..."
+
+    # Execute the server (replaces shell process)
+    exec /app/server
+}
+
+main "$@"