fix failed recognition of custom containerfile due to Windows paths being misinterpreted as git urls

Signed-off-by: Metroite <22453965+Metroite@users.noreply.github.com>

Author: metroite

podman_compose.py

@@ -2883,35 +2883,34 @@ def cleanup_temp_dockfile() -> None:
             cleanup_callbacks.append(cleanup_temp_dockfile)
 
     build_args = []
-    # if givent context was not recognized as git url, try joining paths to get a file locally
-    if not is_context_git_url(ctx):
-        custom_dockerfile_given = False
-        if dockerfile:
+
+    custom_dockerfile_given = False
+    if dockerfile:
+        dockerfile = os.path.join(ctx, dockerfile)
+        custom_dockerfile_given = True
+    else:
+        dockerfile_alts = [
+            "Containerfile",
+            "ContainerFile",
+            "containerfile",
+            "Dockerfile",
+            "DockerFile",
+            "dockerfile",
+        ]
+        for dockerfile in dockerfile_alts:
             dockerfile = os.path.join(ctx, dockerfile)
-            custom_dockerfile_given = True
-        else:
-            dockerfile_alts = [
-                "Containerfile",
-                "ContainerFile",
-                "containerfile",
-                "Dockerfile",
-                "DockerFile",
-                "dockerfile",
-            ]
-            for dockerfile in dockerfile_alts:
-                dockerfile = os.path.join(ctx, dockerfile)
-                if path_exists(dockerfile):
-                    break
+            if path_exists(dockerfile):
+                break
 
-        if path_exists(dockerfile):
-            # normalize dockerfile path, as the user could have provided unpredictable file formats
-            dockerfile = os.path.normpath(os.path.join(ctx, dockerfile))
-            build_args.extend(["-f", dockerfile])
-        else:
-            if custom_dockerfile_given:
-                # custom dockerfile name was also not found in the file system
-                raise OSError(f"Dockerfile not found in {dockerfile}")
-            raise OSError(f"Dockerfile not found in {ctx}")
+    if path_exists(dockerfile):
+        # normalize dockerfile path, as the user could have provided unpredictable file formats
+        dockerfile = os.path.normpath(os.path.join(ctx, dockerfile))
+        build_args.extend(["-f", dockerfile])
+    else:
+        if custom_dockerfile_given:
+            # custom dockerfile name was also not found in the file system
+            raise OSError(f"Dockerfile not found in {dockerfile}")
+        raise OSError(f"Dockerfile not found in {ctx}")
 
     build_args.extend(["-t", cnt["image"]])