Add arm/v7 support

[TomBursch]

Closes https://github.com/TomBursch/kitchenowl/issues/46

Thanks to @titro

[pedroapero]

Here is what I get (building with docker buildx):

 > [builder 4/6] RUN python -m venv /opt/venv && /opt/venv/bin/pip install --no-cache-dir -U pip setuptools wheel:             
97.40 Requirement already satisfied: pip in /opt/venv/lib/python3.11/site-packages (23.2.1)                                    
99.60 Collecting pip                                                                                                           
99.61   Obtaining dependency information for pip from https://files.pythonhosted.org/packages/e0/63/b428aaca15fcd98c39b07ca7149e24bc14205ad0f1c80ba2b01835aedde1/pip-23.3-py3-none-any.whl.metadata                                                           
100.4   Downloading pip-23.3-py3-none-any.whl.metadata (3.5 kB)                                                                
100.5 Requirement already satisfied: setuptools in /opt/venv/lib/python3.11/site-packages (65.5.0)                             
104.5 Collecting setuptools                                                                                                    
104.5   Obtaining dependency information for setuptools from https://files.pythonhosted.org/packages/bb/26/7945080113158354380a12ce26873dd6c1ebd88d47f5bc24e2c5bb38c16a/setuptools-68.2.2-py3-none-any.whl.metadata
104.6   Downloading setuptools-68.2.2-py3-none-any.whl.metadata (6.3 kB)
105.2 Collecting wheel
105.2   Obtaining dependency information for wheel from https://files.pythonhosted.org/packages/b8/8b/31273bf66016be6ad22bb7345c37ff350276cfd46e389a0c2ac5da9d9073/wheel-0.41.2-py3-none-any.whl.metadata
105.2   Downloading wheel-0.41.2-py3-none-any.whl.metadata (2.2 kB)
106.0 Downloading pip-23.3-py3-none-any.whl (2.1 MB)
106.6    ━━━━━━━━━━━━━━━━━━━━━━━━━━━━━━━━━━━━━━━━ 2.1/2.1 MB 3.8 MB/s eta 0:00:00
106.6 Downloading setuptools-68.2.2-py3-none-any.whl (807 kB)
106.8    ━━━━━━━━━━━━━━━━━━━━━━━━━━━━━━━━━━━━━━━━ 807.9/807.9 kB 6.0 MB/s eta 0:00:00
106.8 Downloading wheel-0.41.2-py3-none-any.whl (64 kB)
106.9    ━━━━━━━━━━━━━━━━━━━━━━━━━━━━━━━━━━━━━━━━ 64.8/64.8 kB 6.6 MB/s eta 0:00:00
108.5 Installing collected packages: wheel, setuptools, pip
109.2   Attempting uninstall: setuptools
109.3     Found existing installation: setuptools 65.5.0
109.7     Uninstalling setuptools-65.5.0:
109.9       Successfully uninstalled setuptools-65.5.0
116.5   Attempting uninstall: pip
116.5     Found existing installation: pip 23.2.1
117.5     Uninstalling pip-23.2.1:
117.6       Successfully uninstalled pip-23.2.1
137.0 ERROR: Could not install packages due to an OSError: [Errno 39] Directory not empty: '/tmp/pip-uninstall-nzyvgb26'
137.0 
------
WARNING: No output specified with docker-container driver. Build result will only remain in the build cache. To push result image into registry use --push or to load image into docker use --load
Dockerfile:16
--------------------
  14 |     
  15 |     # Create virtual enviroment
  16 | >>> RUN python -m venv /opt/venv && /opt/venv/bin/pip install --no-cache-dir -U pip setuptools wheel
  17 |     ENV PATH="/opt/venv/bin:$PATH"
  18 |     
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