Move package to src/ to properly separate what goes into docker image

src/restic_compose_backup/config.py

@@ -0,0 +1,29 @@
+import os
+
+
+class Config:
+    """Bag for config values"""
+    def __init__(self, check=True):
+        # Mandatory values
+        self.repository = os.environ.get('RESTIC_REPOSITORY')
+        self.password = os.environ.get('RESTIC_REPOSITORY')
+        self.docker_base_url = os.environ.get('DOCKER_BASE_URL') or "unix://tmp/docker.sock"
+
+        # Log
+        self.log_level = os.environ.get('LOG_LEVEL')
+
+        # forget / keep
+        self.keep_daily = os.environ.get('KEEP_DAILY') or "7"
+        self.keep_weekly = os.environ.get('KEEP_WEEKLY') or "4"
+        self.keep_monthly = os.environ.get('KEEP_MONTHLY') or "12"
+        self.keep_yearly = os.environ.get('KEEP_YEARLY') or "3"
+
+        if check:
+            self.check()
+
+    def check(self):
+        if not self.repository:
+            raise ValueError("RESTIC_REPOSITORY env var not set")
+
+        if not self.password:
+            raise ValueError("RESTIC_REPOSITORY env var not set")