issues/182: Use slog from stdlib

[komuw]

• Fixes: https://github.com/komuw/ong/issues/182

[codecov-commenter]

Codecov Report

Patch coverage: 66.66% and no project coverage change.

Comparison is base (07613af) 74.93% compared to head (a633dc0) 74.93%. Report is 1 commits behind head on main.

Additional details and impacted files

```diff @@ Coverage Diff @@ ## main #349 +/- ## ======================================= Coverage 74.93% 74.93% ======================================= Files 44 44 Lines 4968 4968 ======================================= Hits 3723 3723 Misses 996 996 Partials 249 249 ``` | [Files Changed](https://app.codecov.io/gh/komuw/ong/pull/349?src=pr&el=tree&utm_medium=referral&utm_source=github&utm_content=comment&utm_campaign=pr+comments&utm_term=Komu+Wairagu) | Coverage Δ | | |---|---|---| | [internal/acme/acme.go](https://app.codecov.io/gh/komuw/ong/pull/349?src=pr&el=tree&utm_medium=referral&utm_source=github&utm_content=comment&utm_campaign=pr+comments&utm_term=Komu+Wairagu#diff-aW50ZXJuYWwvYWNtZS9hY21lLmdv) | `75.07% <ø> (ø)` | | | [internal/acme/http\_client.go](https://app.codecov.io/gh/komuw/ong/pull/349?src=pr&el=tree&utm_medium=referral&utm_source=github&utm_content=comment&utm_campaign=pr+comments&utm_term=Komu+Wairagu#diff-aW50ZXJuYWwvYWNtZS9odHRwX2NsaWVudC5nbw==) | `69.18% <0.00%> (ø)` | | | [log/log.go](https://app.codecov.io/gh/komuw/ong/pull/349?src=pr&el=tree&utm_medium=referral&utm_source=github&utm_content=comment&utm_campaign=pr+comments&utm_term=Komu+Wairagu#diff-bG9nL2xvZy5nbw==) | `80.57% <ø> (ø)` | | | [middleware/log.go](https://app.codecov.io/gh/komuw/ong/pull/349?src=pr&el=tree&utm_medium=referral&utm_source=github&utm_content=comment&utm_campaign=pr+comments&utm_term=Komu+Wairagu#diff-bWlkZGxld2FyZS9sb2cuZ28=) | `71.11% <ø> (ø)` | | | [middleware/middleware.go](https://app.codecov.io/gh/komuw/ong/pull/349?src=pr&el=tree&utm_medium=referral&utm_source=github&utm_content=comment&utm_campaign=pr+comments&utm_term=Komu+Wairagu#diff-bWlkZGxld2FyZS9taWRkbGV3YXJlLmdv) | `99.11% <ø> (ø)` | | | [middleware/recoverer.go](https://app.codecov.io/gh/komuw/ong/pull/349?src=pr&el=tree&utm_medium=referral&utm_source=github&utm_content=comment&utm_campaign=pr+comments&utm_term=Komu+Wairagu#diff-bWlkZGxld2FyZS9yZWNvdmVyZXIuZ28=) | `89.74% <ø> (ø)` | | | [mux/mux.go](https://app.codecov.io/gh/komuw/ong/pull/349?src=pr&el=tree&utm_medium=referral&utm_source=github&utm_content=comment&utm_campaign=pr+comments&utm_term=Komu+Wairagu#diff-bXV4L211eC5nbw==) | `80.24% <ø> (ø)` | | | [server/cert.go](https://app.codecov.io/gh/komuw/ong/pull/349?src=pr&el=tree&utm_medium=referral&utm_source=github&utm_content=comment&utm_campaign=pr+comments&utm_term=Komu+Wairagu#diff-c2VydmVyL2NlcnQuZ28=) | `32.15% <ø> (ø)` | | | [server/pprof.go](https://app.codecov.io/gh/komuw/ong/pull/349?src=pr&el=tree&utm_medium=referral&utm_source=github&utm_content=comment&utm_campaign=pr+comments&utm_term=Komu+Wairagu#diff-c2VydmVyL3Bwcm9mLmdv) | `87.50% <ø> (ø)` | | | [server/server.go](https://app.codecov.io/gh/komuw/ong/pull/349?src=pr&el=tree&utm_medium=referral&utm_source=github&utm_content=comment&utm_campaign=pr+comments&utm_term=Komu+Wairagu#diff-c2VydmVyL3NlcnZlci5nbw==) | `75.90% <ø> (ø)` | | | ... and [3 more](https://app.codecov.io/gh/komuw/ong/pull/349?src=pr&el=tree-more&utm_medium=referral&utm_source=github&utm_content=comment&utm_campaign=pr+comments&utm_term=Komu+Wairagu) | |

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