fix: static binary build, debian base image, env_file

compose/launcher.yaml

@@ -7,9 +7,9 @@ services:
       - "9000"
     volumes:
       - /opt/nextworkspace/:/opt/nextworkspace/
-      - /opt/nextworkspace/.env:/opt/nextworkspace/.env
     working_dir: /opt/nextworkspace
     command: /opt/nextworkspace/nextworkspace
+    env_file: /opt/nextworkspace/.env
     environment:
       - CONFIG_DIR=/opt/nextworkspace/config/nextworkspace
     networks:

deploy.sh

@@ -29,9 +29,9 @@ cd "$REPO_DIR"
 echo "[1/6] Pulling latest code..."
 git pull 2>/dev/null || true
 
-echo "[2/6] Building binary..."
+echo "[2/6] Building binary (static)..."
 export PATH=$PATH:/usr/local/go/bin
-go build -o nextworkspace .
+CGO_ENABLED=0 go build -o nextworkspace .
 
 # --- Greenfield ---
 if [ "$GREENFIELD" = true ]; then