docker matrix: add Python version column

docker/README.md

@@ -2,19 +2,19 @@
 
 # GRASS GIS docker matrix
 
-| Base image   | Docker tag      | GRASS GIS  | PROJ  | GDAL  | PDAL  | Image size |
-|--------------|-----------------|------------|-------|-------|-------|------------|
-| Ubuntu 18.04 | latest-ubuntu   | 7.9.dev    | 4.9.3 | 2.2.3 | 1.8.0 | 1.04 GB    |
-| Ubuntu 19.10 | latest-ubuntu19 | 7.9.dev    | 5.2.0 | 2.4.2 | 1.9.1 |  850 MB    |
-| Debian 10.1  | latest-debian   | 7.9.dev    | 5.2.0 | 2.4.0 | 1.8.0 | 1.14 GB    |
-| Alpine 3.11  | latest-alpine   | 7.9.dev    | 7.0.1 | 3.1.1 | 2.1.0 |  385 MB    |
-|--------------|-----------------|------------|-------|-------|-------|------------|
-| Ubuntu 18.04 | stable-ubuntu   | 7.8 branch | 4.9.3 | 2.2.3 | 1.8.0 | 1.04 GB    |
-| Ubuntu 19.10 | stable-ubuntu19 | 7.8 branch | 5.2.0 | 2.4.2 | 1.9.1 |  850 MB    |
-| Debian 10.1  | stable-debian   | 7.8 branch | 5.2.0 | 2.4.0 | 1.8.0 | 1.14 GB    |
-| Alpine 3.11  | stable-alpine   | 7.8 branch | 7.0.1 | 3.1.1 | 2.1.0 |  385 MB    |
-
-Last update: 12 July 2020
+| Base image   | Docker tag      | GRASS GIS  | PROJ  | GDAL  | PDAL  | Python | Image size |
+|--------------|-----------------|------------|-------|-------|-------|--------|------------|
+| Ubuntu 18.04 | latest-ubuntu   | 7.9.dev    | 4.9.3 | 2.2.3 | 1.8.0 | 3.6.9  | 1.04 GB    |
+| Ubuntu 19.10 | latest-ubuntu19 | 7.9.dev    | 5.2.0 | 2.4.2 | 1.9.1 | 3.7.5  |  850 MB    |
+| Debian 10.1  | latest-debian   | 7.9.dev    | 5.2.0 | 2.4.0 | 1.8.0 | 3.7.3  | 1.14 GB    |
+| Alpine 3.11  | latest-alpine   | 7.9.dev    | 7.0.1 | 3.1.2 | 2.1.0 | 3.5.8  |  385 MB    |
+|--------------|-----------------|------------|-------|-------|-------|--------|------------|
+| Ubuntu 18.04 | stable-ubuntu   | 7.8 branch | 4.9.3 | 2.2.3 | 1.8.0 | 3.6.9  | 1.04 GB    |
+| Ubuntu 19.10 | stable-ubuntu19 | 7.8 branch | 5.2.0 | 2.4.2 | 1.9.1 | 3.7.5  |  850 MB    |
+| Debian 10.1  | stable-debian   | 7.8 branch | 5.2.0 | 2.4.0 | 1.8.0 | 3.7.3  | 1.14 GB    |
+| Alpine 3.11  | stable-alpine   | 7.8 branch | 7.0.1 | 3.1.2 | 2.1.0 | 3.5.8  |  385 MB    |
+
+Last update: 25 Aug 2020 (source: https://hub.docker.com/r/mundialis/grass-py3-pdal/builds)
 
 # Requirements
 
@@ -28,4 +28,4 @@ To install a docker image, run (replace `<tag>` with the desired Docker tag from
 docker pull mundialis/grass-py3-pdal:<tag>
 ```
 
-See also: https://grass.osgeo.org/download/software/docker-images/
+See also: https://grass.osgeo.org/download/docker/