Fix imagecodecs issue

[tcompa]

Branching from #13

Where I got stuck

Task installation seems to get a bit tricky. At first, I struggle with figuring out which Python version to use (3.9 and 3.10 were not available in the container. But 3.11 was available.

The larger issue is that we're running into a bug while installing imagecodecs:

      Compiling imagecodecs/_aec.pyx because it changed.
      [1/1] Cythonizing imagecodecs/_aec.pyx
      building 'imagecodecs._aec' extension
      creating build/temp.linux-aarch64-cpython-311
      creating build/temp.linux-aarch64-cpython-311/imagecodecs
      gcc -Wsign-compare -DNDEBUG -g -fwrapv -O3 -Wall -fPIC -Iimagecodecs -I/home/fractal-share/tasks/.fractal/fractal-tasks-core0.10.1/venv/include -I/usr/local/include/python3.11 -I/tmp/pip-build-env-g4bzjo3a/overlay/lib/python3.11/site-packages/numpy/core/include -c imagecodecs/_aec.c -o build/temp.linux-aarch64-cpython-311/imagecodecs/_aec.o
      In file included from /tmp/pip-build-env-g4bzjo3a/overlay/lib/python3.11/site-packages/numpy/core/include/numpy/ndarraytypes.h:1929,
                       from /tmp/pip-build-env-g4bzjo3a/overlay/lib/python3.11/site-packages/numpy/core/include/numpy/ndarrayobject.h:12,
                       from /tmp/pip-build-env-g4bzjo3a/overlay/lib/python3.11/site-packages/numpy/core/include/numpy/arrayobject.h:5,
                       from imagecodecs/_aec.c:1177:
      /tmp/pip-build-env-g4bzjo3a/overlay/lib/python3.11/site-packages/numpy/core/include/numpy/npy_1_7_deprecated_api.h:17:2: warning: #warning "Using deprecated NumPy API, disable it with " "#define NPY_NO_DEPRECATED_API NPY_1_7_API_VERSION" [-Wcpp]
         17 | #warning "Using deprecated NumPy API, disable it with " \
            |  ^~~~~~~
      imagecodecs/_aec.c:1184:10: fatal error: libaec.h: No such file or directory
       1184 | #include "libaec.h"
            |          ^~~~~~~~~~
      compilation terminated.
      error: command '/usr/bin/gcc' failed with exit code 1
      [end of output]
  
  note: This error originates from a subprocess, and is likely not a problem with pip.
  ERROR: Failed building wheel for imagecodecs
ERROR: Could not build wheels for imagecodecs, which is required to install pyproject.toml-based projects

[tcompa]

To-do:

• Always install libaec-dev in the server container, through apt.

This should also make the linux/ARM combination work (to be checked!).

[tcompa]

* Always install `libaec-dev` in the server container, through `apt`.

This was already done (by mistake, as I only wanted to update something else in that same file), as part of 99d0e67.

Thus it would be useful to re-test the failing steps (make run and then fractal-tasks-core collection) with the current main on a ARM machine (cc @jluethi). In principle the newly-added system library may fix the reported issue, but we cannot immediately verify it.

[tcompa]

As of the latest commits in main, the only supported way to run the demos (at least for the moment) is

make run-demos

This results in

• an active postgres session
• fractal-server on port 8000
• fractal-web on port 5173
• A git-clone of the demos, a trigger of fractal-tasks-core collection, an execution of example 01

The whole process may take 5-10 minutes. The monitoring can be done from the terminal, or (as soon as it is up) from fractal-web. Once fractal-web is up, the step that typically take the longest is the task collection (maybe somewhat slower in the containers than when it's directly on the host machine - to check).