fix: Edit service file to wait on containerd

[Callisto13]

Flintlock depends on containerd so it should wait for it to become available and stop when the containerd service stops.
In a dev environment, the containerd service may be running under another name, so flintlock should watch the correct one.

[codecov-commenter]

Codecov Report

Base: 56.68% // Head: 56.57% // Decreases project coverage by -0.10% ⚠️

Coverage data is based on head (e50de8e) compared to base (76a0a37).
Patch has no changes to coverable lines.

❗ Current head e50de8e differs from pull request most recent head faa056a. Consider uploading reports for the commit faa056a to get more accurate results

Additional details and impacted files

@@            Coverage Diff             @@
##             main     #567      +/-   ##
==========================================
- Coverage   56.68%   56.57%   -0.11%     
==========================================
  Files          57       57              
  Lines        2768     2768              
==========================================
- Hits         1569     1566       -3     
- Misses       1059     1061       +2     
- Partials      140      141       +1     

Impacted Files	Coverage Δ
pkg/queue/queue.go	93.93% <0.00%> (-6.07%)	⬇️
pkg/process/process.go	39.62% <0.00%> (-1.89%)	⬇️

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