Update readme

README.md

@@ -1,35 +1,82 @@
 # guacamole-user-sync
 Synchronise a Guacamole PostgreSQL database with an LDAP server, such as Microsoft Active Directory
 
+[![Latest image](https://ghcr-badge.egpl.dev/alan-turing-institute/guacamole-user-sync/latest_tag)](https://github.com/alan-turing-institute/guacamole-user-sync/pkgs/container/guacamole-user-sync)
+[![Image size](https://ghcr-badge.egpl.dev/alan-turing-institute/guacamole-user-sync/size)](https://github.com/alan-turing-institute/guacamole-user-sync/pkgs/container/guacamole-user-sync)
+[![Publish status](https://github.com/alan-turing-institute/guacamole-user-sync/actions/workflows/publish_docker.yaml/badge.svg)](https://github.com/alan-turing-institute/guacamole-user-sync/pkgs/)
+
+## Running with Docker
+
+You can run this Docker image as follows
+
+```console
+$ docker run -it \
+    -e LDAP_HOST=$(your LDAP server host) \
+    -e LDAP_GROUP_BASE_DN=$(your LDAP group DN) \
+    -e LDAP_GROUP_FILTER=$(your LDAP group filter) \
+    -e LDAP_USER_BASE_DN=$(your LDAP user DN) \
+    -e LDAP_USER_FILTER=$(your LDAP user filter) \
+    -e POSTGRESQL_HOST=$(your PostgreSQL server host) \
+    -e POSTGRESQL_PASSWORD=$(your PostgreSQL connection password) \
+    -e POSTGRESQL_USERNAME=$(your PostgreSQL connection username) \
+    ghcr.io/alan-turing-institute/guacamole-user-sync:$(version you want to use)
+```
+
 ## Environment variables
 
-- DEBUG: Enable debug output (default: 'False')
-- LDAP_BIND_DN: (Optional) distinguished name of LDAP bind user
-- LDAP_BIND_PASSWORD: (Optional) password of LDAP bind user
-- LDAP_GROUP_BASE_DN: Base DN for groups
-- LDAP_GROUP_FILTER: LDAP filter to select groups
-- LDAP_GROUP_NAME_ATTR: Attribute used to extract group names (default: 'cn')
-- LDAP_HOST: LDAP host
-- LDAP_PORT: LDAP port (default: '389')
-- LDAP_USER_BASE_DN: Base DN for users
-- LDAP_USER_FILTER: LDAP filter to select users
-- LDAP_USER_NAME_ATTR: Attribute used to extract user names (default: 'userPrincipalName')
-- POSTGRESQL_DB_NAME: Database name for PostgreSQL server (default: 'guacamole')
-- POSTGRESQL_HOST: PostgreSQL server host
-- POSTGRESQL_PASSWORD: Password of PostgreSQL user
-- POSTGRESQL_PORT: PostgreSQL server port (default: '5432')
-- POSTGRESQL_USERNAME: Username of PostgreSQL user
-- REPEAT_INTERVAL: How often (in seconds) to wait before attempting to synchronise again (default: '300')
-
-## Tests
-
-To run the tests you will need to install
-
-- `bats-core`
-- `yq`
-
-The tests can be run with:
+- `DEBUG`: Enable debug output (default: 'False')
+- `LDAP_BIND_DN`: (Optional) distinguished name of LDAP bind user
+- `LDAP_BIND_PASSWORD`: (Optional) password of LDAP bind user
+- `LDAP_GROUP_BASE_DN`: Base DN for groups
+- `LDAP_GROUP_FILTER`: LDAP filter to select groups
+- `LDAP_GROUP_NAME_ATTR`: Attribute used to extract group names (default: 'cn')
+- `LDAP_HOST`: LDAP host
+- `LDAP_PORT`: LDAP port (default: '389')
+- `LDAP_USER_BASE_DN`: Base DN for users
+- `LDAP_USER_FILTER`: LDAP filter to select users
+- `LDAP_USER_NAME_ATTR`: Attribute used to extract user names (default: 'userPrincipalName')
+- `POSTGRESQL_DB_NAME`: Database name for PostgreSQL server (default: 'guacamole')
+- `POSTGRESQL_HOST`: PostgreSQL server host
+- `POSTGRESQL_PASSWORD`: Password of PostgreSQL user
+- `POSTGRESQL_PORT`: PostgreSQL server port (default: '5432')
+- `POSTGRESQL_USERNAME`: Username of PostgreSQL user
+- `REPEAT_INTERVAL`: How often (in seconds) to wait before attempting to synchronise again (default: '300')
+
+## Contributing
+
+Pull requests are always welcome.
+
+### Running with Docker
+
+Build the Docker image with
+
+```console
+$ docker build . -t guacamole-user-sync
+```
+
+Run the Docker image you have just built with
+
+```console
+$ docker run -it \
+    -e LDAP_HOST=$(your LDAP server host) \
+    -e LDAP_GROUP_BASE_DN=$(your LDAP group DN) \
+    -e LDAP_GROUP_FILTER=$(your LDAP group filter) \
+    -e LDAP_USER_BASE_DN=$(your LDAP user DN) \
+    -e LDAP_USER_FILTER=$(your LDAP user filter) \
+    -e POSTGRESQL_HOST=$(your PostgreSQL server host) \
+    -e POSTGRESQL_PASSWORD=$(your PostgreSQL connection password) \
+    -e POSTGRESQL_USERNAME=$(your PostgreSQL connection username) \
+    guacamole-user-sync
+```
+
+### Tests
+
+In order to run the tests, you should install the following prerequisites:
+
+- [`hatch`](https://hatch.pypa.io/latest/install/)
+
+The tests can then be run with
 
 ```console
-$ bats tests
+$ hatch run test:all
 ```