feat: Move getGitCommit from api to tools

tools.py

@@ -10,6 +10,27 @@ def getClientIP(request):
         ip = request.remote_addr
     return ip
 
+def getGitCommit():
+    # if .git exists, get the latest commit hash
+    if os.path.isdir(".git"):
+        git_dir = ".git"
+        head_ref = ""
+        with open(os.path.join(git_dir, "HEAD")) as file:
+            head_ref = file.read().strip()
+        if head_ref.startswith("ref: "):
+            head_ref = head_ref[5:]
+            with open(os.path.join(git_dir, head_ref)) as file:
+                return file.read().strip()
+        else:
+            return head_ref
+
+    # Check if env SOURCE_COMMIT is set
+    if "SOURCE_COMMIT" in os.environ:
+        return os.environ["SOURCE_COMMIT"]
+
+    return "failed to get version"
+
+
 def isCurl(request: Request) -> bool:
     """
     Check if the request is from curl