Tested and verified a method for pushing the bot onto heroku using docker.

.gitignore

@@ -91,6 +91,7 @@ ENV/
 env.bak/
 venv.bak/
 environment
+environment.environment
 
 # Spyder project settings
 .spyderproject

Dockerfile

@@ -6,12 +6,12 @@ RUN apt-get update
 RUN apt-get install -y git apt-utils sqlite3
 RUN DEBIAN_FRONTEND="noninteractive" apt-get install -y libcairo2-dev libgirepository1.0-dev libpango1.0-dev pkg-config python3-dev gir1.2-pango-1.0 python3.8-venv libpython3.8-dev libjpeg-dev zlib1g-dev python3-pip
 RUN python3.8 -m pip install poetry
-
-COPY ./poetry.lock ./poetry.lock
-COPY ./pyproject.toml ./pyproject.toml
-
+RUN ls
+COPY ./ ./
 RUN python3.8 -m poetry install
 
 COPY . .
 
 ENTRYPOINT ["/TLE/run.sh"]
+
+RUN chmod +x /TLE && /TLE/run.sh

ProcFile

@@ -0,0 +1 @@
+worker: bash run.sh

docker-compose.yml

@@ -0,0 +1,6 @@
+version: "3.8"
+
+services:
+  corona-discord-bot:
+    build: ./
+    env_file: .env

heroku-docker.md

@@ -0,0 +1,44 @@
+# How to push docker-image and deploy on Heroku
+## Reason to do it
+Deploying docker image via Heroku is a faster method than deploying the whole project on Heroku and requires less effort.
+
+## Prior Knowledge
+- Deploy the bot on Discord. 
+
+## Create Environment file
+- Create a copy of file `environment.template` and name it `.env` file.
+- Replace `xxxxxxxxx.xxxxxxxxx` with your credentials.
+
+## Build Docker Image
+Follow the steps written in the `Docker.md` file or use the alternative method listed below. 
+```bash
+docker-compose up --build -d
+```
+
+To check if your docker image is running or not:
+```bash 
+docker-compose logs -f
+```
+this will print the log
+press `Ctrl+C` to get out of it
+
+run `docker ps` or docker images to get the name of docker image, which will look like this.
+```
+CONTAINER ID   IMAGE                   COMMAND   CREATED   STATUS    PORTS     NAMES
+123123         <docker-image name_1>              latest                    <docker-image name>
+```
+- Open Heroku now and create an app or use heroku cli for it.
+```bash
+heroku create <heroku app-name>
+```
+- Push the docker image onto heroku
+```bash
+ heroku container:push <docker-image name> -a <heroku app name> 
+ ```
+
+ - Release the docker image
+```bash
+ heroku container:release <docker-image name> -a <heroku app name> 
+ ```
+
+ - Open heroku dashboard, then open the Resources tab and turn on the worker.

heroku.yml

@@ -0,0 +1,7 @@
+build:
+  docker:
+    worker: Dockerfile
+setup:
+  addons:
+  - plan: heroku-postgresql
+    as: DATABASE

run.sh

@@ -9,7 +9,6 @@ while true; do
     git pull
     poetry install
     FONTCONFIG_FILE=$PWD/extra/fonts.conf poetry run python -m tle
-
     (( $? != 42 )) && break
 
     echo '==================================================================='