add nix flake & direnv support

Adds a nix flake with the following features/enhancements:

• builds docker image without qemu/root
• nix develop environment with compatibility to nix-shell
• direnv support with nix-direnv
• ci infrastructure for docker build and caching
• adds a nix binary cache hosted with cachix
  • pubkey: flow3r.cachix.org-1:/v8059Hm6UdEVNKE15uxltpYM0z+pulaTpobjIvFM5A=
  • currently in the cachix account of @fpletz

The new nix-deps job that runs before all other jobs takes less than one minute if nothing needs to be built in case everything is already cached.

requested review from @q3k

By fpletz on 2023-08-17T14:05:41 (imported from GitLab)

added 21 commits

• c9964122...3a56e3c1 - 20 commits from branch main
• 14395894 - add nix flake & direnv support

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By fpletz on 2023-08-17T14:06:47 (imported from GitLab)

Looks good at a first glance.

Could you please update .gitlab-ci.yml to mention how to build the OCI image?

By q3k on 2023-08-17T15:25:18 (imported from GitLab)

added 1 commit

• 32c82ef8 - ci: build docker image with cache

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By fpletz on 2023-08-17T22:29:31 (imported from GitLab)

added 6 commits

• 32c82ef8...a00ff58e - 2 commits from branch main
• 45a7a466 - wifi: catch OSError when connecting
• 2df08fe4 - changelog: v1.1.1
• 5bdd1b08 - add nix flake & direnv support
• 7cc366eb - ci: build docker image with cache

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By fpletz on 2023-08-18T00:40:09 (imported from GitLab)

added 1 commit

• ecbbdadb - ci: build docker image with cache

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By fpletz on 2023-08-18T00:46:19 (imported from GitLab)

added 1 commit

• f3d5efe6 - ci: build docker image with cache

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By fpletz on 2023-08-18T01:09:56 (imported from GitLab)

added 1 commit

• 3cc8455c - ci: build docker image with cache

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By fpletz on 2023-08-18T01:20:05 (imported from GitLab)

added 1 commit

• 230786f9 - ci: build docker image with cache

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By fpletz on 2023-08-18T01:43:58 (imported from GitLab)

added 1 commit

• 0dbb27b7 - ci: build docker image with cache

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By fpletz on 2023-08-18T02:04:20 (imported from GitLab)

added 1 commit

• c06dd192 - ci: build docker image with cache

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By fpletz on 2023-08-18T02:12:34 (imported from GitLab)

added 19 commits

• c06dd192...86d25a57 - 17 commits from branch main
• 97e3ad0b - add nix flake & direnv support
• 6e68eb44 - ci: build docker image with cache

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By fpletz on 2023-08-18T03:51:35 (imported from GitLab)

Unfortunately the local Docker registry is broken: https://git.flow3r.garden/flow3r/flow3r-firmware/-/jobs/20112#L136

By fpletz on 2023-08-18T03:56:31 (imported from GitLab)

added 3 commits

• f96e35b0 - 1 commit from branch main
• f74ab1e3 - add nix flake & direnv support
• 431cb7d4 - ci: build docker image with cache

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By fpletz on 2023-08-18T13:34:21 (imported from GitLab)

added 1 commit

• 3331b934 - ci: build docker image with cache

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By fpletz on 2023-08-18T14:44:50 (imported from GitLab)

added 1 commit

• 7505becd - ci: build docker image with cache

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By fpletz on 2023-08-18T15:02:49 (imported from GitLab)

added 1 commit

• d12064e8 - ci: build docker image with cache

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By fpletz on 2023-08-18T16:10:50 (imported from GitLab)

marked this merge request as ready

By fpletz on 2023-08-18T16:23:23 (imported from GitLab)

changed the description

By fpletz on 2023-08-18T16:23:23 (imported from GitLab)

added 6 commits

• d12064e8...23ffd052 - 4 commits from branch main
• 2ddfe6c7 - add nix flake & direnv support
• d705ef36 - ci: build docker image with cache

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By fpletz on 2023-08-18T17:27:46 (imported from GitLab)