Update docker-install.md (#16)

* Update docker-install.md

Added instructions to build the container from the latest version of HADDOCK3

* small upgrades

---------

Co-authored-by: VGPReys <v.g.p.reys@uu.nl>

Author: amjjbonvin

src/docker-install.md

@@ -1,32 +1,54 @@
 # Using HADDOCK3 through its docker image
 
 As part of the possible usage of HADDOCK3, we also provide a ready to use `docker` image of HADDOCK3, where tools and packages are already installed.
+Note that this image corresponds to the latest release of HADDOCK3, and not the latest version. To use the latest version in docker rather build it directly ([see below](#building-your-own-docker-container-from-the-latest-version-of-haddock3)).
 
 ## DOCKER
 
 To be able to use a provided image, you first need to have `docker` installed.
 Please follow the instructions you can find there: [https://www.docker.com/](https://www.docker.com/).
 
 
-## Installing HADDOCK3 from provided image
+## Installing HADDOCK3 from provided images
+
+### Installing the latest release
 
 ```bash
-# Install the latest haddock3 version
 docker pull ghcr.io/haddocking/haddock3:latest
 docker tag ghcr.io/haddocking/haddock3:latest haddock3
+```
+
+### Install a specific version
+
+To install a specific version of haddock3, you must specify which release you are interested in (e.g.: `2025.05.0`)
+
+```bash
+docker run ghcr.io/haddocking/haddock3:2025.05.0
+docker tag ghcr.io/haddocking/haddock3:2025.05.0 haddock3
+```
+
+Check [here](https://github.com/haddocking/haddock3/pkgs/container/haddock3/versions?filters%5Bversion_type%5D=tagged) to see the list of available releases.
 
-## OR
+## Building your own docker container from the latest version of HADDOCK3
 
-# Install a haddock3 specific version (e.g: 2024.12.0b7)
-docker run ghcr.io/haddocking/haddock3:2024.12.0b7
-docker tag ghcr.io/haddocking/haddock3:2024.12.0b7 haddock3
+With this approach, you will be building a new docker image from the latest version available in the main branch of the [haddock3 GitHub repository](https://github.com/haddocking/haddock3).
 
-# Run HADDOCK with a workflow file, e.g. myworkflow.cfg
+```bash
+# Build a container from the latest haddock3 version
+git clone https://github.com/haddocking/haddock3.git
+cd haddock3
+docker build . --label haddock3 --tag haddock3
+```
+
+## Run HADDOCK with a workflow file, e.g. myworkflow.cfg
+
+```bash
 docker run \
     -v $(pwd):/cwd  \
     --workdir /cwd \
     -u $(id -u)  \
     haddock3 \
     myworkflow.cfg
-
 ```
+
+