feat: Add docker-compose to indexer

[roninjin10]

• adds a docker-compose file for running indexer with docker-compose up
• adds example.env file

[changeset-bot]

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Latest commit: a1ec914

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[codecov]

Codecov Report

Merging #5776 (5d2e39a) into develop (39aab99) will decrease coverage by 2.51%.
The diff coverage is n/a.

❗ Current head 5d2e39a differs from pull request most recent head a1ec914. Consider uploading reports for the commit a1ec914 to get more accurate results

Additional details and impacted files

@@             Coverage Diff             @@
##           develop    #5776      +/-   ##
===========================================
- Coverage    42.28%   39.77%   -2.51%     
===========================================
  Files          464      303     -161     
  Lines        30078    25201    -4877     
  Branches       876        0     -876     
===========================================
- Hits         12717    10024    -2693     
+ Misses       16361    14236    -2125     
+ Partials      1000      941      -59     

Flag	Coverage Δ
bedrock-go-tests	39.77% <ø> (+0.07%)	⬆️
common-ts-tests	?
contracts-bedrock-tests	?
contracts-tests	?
core-utils-tests	?
dtl-tests	?
fault-detector-tests	?
sdk-tests	?

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see 171 files with indirect coverage changes

[hamdiallam]

Generally LGTM! I'll play around with this on my machine

[mergify]

This PR has been added to the merge queue, and will be merged soon.

[mergify]

This PR is next in line to be merged, and will be merged as soon as checks pass.