refactor: add start command

bin/configure

@@ -1,6 +1,10 @@
 #!/bin/sh
 set -euC
 
+_activate_venv() {
+    . .venv/bin/activate
+}
+
 _venv() {
 	_py_version=${1:-3.12.0}
 
@@ -17,7 +21,7 @@ VENV_match=venv
 
 _init() {
 	if [ -d .venv ]; then
-		source .venv/bin/activate
+        _activate_venv
 		pip install --upgrade pip
 		pip install -r requirements.txt
 	else
@@ -28,7 +32,7 @@ INIT_match=init
 
 _freeze() {
 	if [ -d .venv ]; then
-		source .venv/bin/activate
+        _activate_venv
 		mv requirements.txt requirements.txt.bak
 		pip freeze >requirements.txt
 	else
@@ -37,11 +41,32 @@ _freeze() {
 }
 FREEZE_match=freeze
 
+_start() {
+	_env=${1:-dev}
+	_port=${2:-8001}
+	_host=${3:-0.0.0.0}
+
+	case "$_env" in
+	dev) ;;
+	prod) _env=run ;;
+	*)
+		echo "Invalid environment: $_env"
+		exit 1
+		;;
+	esac
+
+	_activate_venv
+
+	fastapi $_env src/main.py --host $_host --port $_port
+}
+START_match=start
+
 _help() {
-	echo -e "Usage: $0 [help, -h | init {python_version} | venv {python_version} | freeze]\n"
+	echo -e "Usage: $0 [help, -h | venv | init | start | freeze]\n"
 	echo "       help, -h: Show this help message"
-	echo "       init: Initialize virtual environment with {python_version} and install dependencies"
-	echo "       venv: Create virtual environment with {python_version}"
+	echo "       venv \${python_version}: Create virtual environment with \${python_version}"
+	echo "       init \${python_version}: Initialize virtual environment with \${python_version} and install dependencies"
+    echo "       start \${env(dev|prod):-dev} \${port:-8001} \${host:-0.0.0.0}: Start the application"
 	echo "       freeze: Freeze dependencies"
 }
 
@@ -68,10 +93,12 @@ _main() {
 	case "$_cmd" in
 	--*) ;;
 	help | -h) _help ;;
+    "$START_match") _start "$@" ;;
 	"$VENV_match") _venv "$@" ;;
 	"$INIT_match")
 		_venv "$@"
-		_init
+        shift
+		_init "$@"
 		;;
 	"$FREEZE_match") _freeze ;;
 	esac