Update Dockerfile for go 1.18

[someone235]

No description provided.

[codecov]

Codecov Report

Merging #2038 (25d2ffa) into dev (9ffbb15) will increase coverage by 0.00%.
The diff coverage is n/a.

@@           Coverage Diff           @@
##              dev    #2038   +/-   ##
=======================================
  Coverage   59.40%   59.41%           
=======================================
  Files         675      675           
  Lines       32213    32213           
=======================================
+ Hits        19137    19138    +1     
- Misses      10322    10323    +1     
+ Partials     2754     2752    -2     

Impacted Files	Coverage Δ
...selectedchainstore/headers_selected_chain_store.go	72.09% <0.00%> (-3.49%)	⬇️
...k/netadapter/server/grpcserver/connection_loops.go	56.89% <0.00%> (-3.45%)	⬇️
.../protocol/flows/v5/blockrelay/handle_relay_invs.go	53.44% <0.00%> (+0.80%)	⬆️
infrastructure/network/addressmanager/store.go	79.11% <0.00%> (+1.26%)	⬆️
infrastructure/network/rpcclient/rpcclient.go	62.92% <0.00%> (+2.24%)	⬆️

---

Continue to review full report at Codecov.

Legend - Click here to learn more
Δ = absolute <relative> (impact), ø = not affected, ? = missing data
Powered by Codecov. Last update 9ffbb15...25d2ffa. Read the comment docs.