chore(docker): add more ignore to .dockerignore to increase context archive setup

[fuxingloh]

What this PR does / why we need it:

As per title, to assist with #61 build durations. For better DX.

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[DieHard073055]

Thanks! LGTM

[codecov]

Codecov Report

Base: 6.43% // Head: 89.47% // Increases project coverage by +83.04% 🎉

Coverage data is based on head (1419c08) compared to base (dbbc296).
Patch has no changes to coverable lines.

Additional details and impacted files

@@            Coverage Diff             @@
##            main     #161       +/-   ##
==========================================
+ Coverage   6.43%   89.47%   +83.04%     
==========================================
  Files         14        4       -10     
  Lines       1804       57     -1747     
  Branches       3        3               
==========================================
- Hits         116       51       -65     
+ Misses      1688        6     -1682     

Impacted Files	Coverage Δ
meta/meta-runtime/src/tests.rs
meta/meta-runtime/src/mock.rs
meta/meta-node/src/cli.rs
meta/meta-node/src/service.rs
meta/meta-node/src/main.rs
meta/meta-consensus/src/lib.rs
meta/meta-node/src/rpc.rs
meta/meta-node/src/chain_spec.rs
meta/meta-node/src/command.rs
meta/meta-runtime/src/lib.rs

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