add current git commit to summary.

lnbits/__main__.py

@@ -1,6 +1,6 @@
 from .app import create_app
 from .commands import migrate_databases, transpile_scss, bundle_vendored
-from .settings import LNBITS_SITE_TITLE, SERVICE_FEE, DEBUG, LNBITS_DATA_FOLDER, WALLET
+from .settings import LNBITS_SITE_TITLE, SERVICE_FEE, DEBUG, LNBITS_DATA_FOLDER, WALLET, LNBITS_COMMIT
 
 migrate_databases()
 transpile_scss()
@@ -10,6 +10,7 @@ app = create_app()
 
 print(
     f"""Starting LNbits with
+  - git version: {LNBITS_COMMIT}
   - site title: {LNBITS_SITE_TITLE}
   - debug: {DEBUG}
   - data folder: {LNBITS_DATA_FOLDER}

lnbits/settings.py

@@ -1,3 +1,4 @@
+import subprocess
 import importlib
 
 from environs import Env  # type: ignore
@@ -27,3 +28,8 @@ DEFAULT_WALLET_NAME = env.str("LNBITS_DEFAULT_WALLET_NAME", default="LNbits wall
 PREFER_SECURE_URLS = env.bool("LNBITS_FORCE_HTTPS", default=True)
 
 SERVICE_FEE = env.float("LNBITS_SERVICE_FEE", default=0.0)
+
+try:
+    LNBITS_COMMIT = subprocess.check_output(["git", "-C", LNBITS_PATH, "rev-parse", "HEAD"]).strip().decode("ascii")
+except:
+    LNBITS_COMMIT = "unknown"