Add docker hostingmethod

Author: fourjr

CHANGELOG.md

@@ -6,6 +6,12 @@ The format is based on [Keep a Changelog](https://keepachangelog.com/en/1.0.0/).
 This project mostly adheres to [Semantic Versioning](https://semver.org/spec/v2.0.0.html);
 however, insignificant breaking changes do not guarantee a major version bump, see the reasoning [here](https://github.com/kyb3r/modmail/issues/319). If you're a plugin developer, note the "BREAKING" section.
 
+# v3.9.2
+
+### Improved
+
+- Additional HostingMethods (i.e. DOCKER, PM2, SCREEN). Autoupdates are now disabled on all docker instances. ([GH #2977](https://github.com/kyb3r/modmail/issues/2977), [PR #2988](https://github.com/kyb3r/modmail/pull/2988))
+
 # v3.9.1
 
 ### Internal

Dockerfile

@@ -1,4 +1,5 @@
 FROM python:3.7-alpine
+ENV USING_DOCKER yes
 WORKDIR /modmailbot
 COPY . /modmailbot
 RUN  export PIP_NO_CACHE_DIR=false \

bot.py

@@ -112,6 +112,12 @@ def hosting_method(self) -> HostingMethod:
         if os.environ.get("INVOCATION_ID"):
             return HostingMethod.SYSTEMD
 
+        if os.environ.get("USING_DOCKER"):
+            return HostingMethod.DOCKER
+
+        if os.environ.get("INVOCATION_ID"):
+            return HostingMethod.SYSTEMD
+
         if os.environ.get("TERM"):
             return HostingMethod.SCREEN
 
@@ -1671,6 +1677,10 @@ async def before_autoupdate(self):
             logger.warning("Autoupdates disabled.")
             self.autoupdate_loop.cancel()
 
+        if self.hosting_method == HostingMethod.DOCKER:
+            logger.warning("Autoupdates disabled as using Docker.")
+            self.autoupdate_loop.cancel()
+
         if not self.config.get("github_token") and self.hosting_method == HostingMethod.HEROKU:
             logger.warning("GitHub access token not found.")
             logger.warning("Autoupdates disabled.")

core/models.py

@@ -276,6 +276,7 @@ class DMDisabled(IntEnum):
 class HostingMethod(IntEnum):
     HEROKU = 0
     PM2 = 1
-    OTHER = 2
-    SYSTEMD = 3
-    SCREEN = 4
+    SYSTEMD = 2
+    SCREEN = 3
+    DOCKER = 4
+    OTHER = 5