Command failed with exit code 134: npm run build (https://ntl.fyi/exit-code-134)

hey there Netlify Forum,

running into this build error when deploying my project:

Error message
9:48:53 AM:   Command failed with exit code 134: npm run build (https://ntl.fyi/exit-code-134)

everything works locally when I run β€˜npm run build’

this is my Netlify.toml file:

[build]
  publish = "dist"               
  command = "npm run build" 
[functions]
  directory = "functions"
[[headers]]
  for = "/*"
  [headers.values]
    X-Robots-Tag = "index, follow"

not too sure exactly where to go from here, will paste the full error log here for reference

9:48:51 AM: 16:48:51   └─ /home/index.html[astro-imagetools]  alt  is not a valid BackgroundImage Config Option
9:48:51 AM: free(): invalid size
9:48:52 AM: Aborted (core dumped)
9:48:53 AM: ​
9:48:53 AM: "build.command" failed                                        
9:48:53 AM: ────────────────────────────────────────────────────────────────
9:48:53 AM: ​
9:48:53 AM:   Error message
9:48:53 AM:   Command failed with exit code 134: npm run build (https://ntl.fyi/exit-code-134)
9:48:53 AM: ​
9:48:53 AM:   Error location
9:48:53 AM:   In build.command from netlify.toml:
9:48:53 AM:   npm run build
9:48:53 AM: ​
9:48:53 AM:   Resolved config
9:48:53 AM:   build:
9:48:53 AM:     command: npm run build
9:48:53 AM:     commandOrigin: config
9:48:53 AM:     environment:
9:48:53 AM:       - KY_API_KEY
9:48:53 AM:       - MC_API_KEY
9:48:53 AM:       - RC_SECRET_KEY
9:48:53 AM:       - REVIEW_ID
9:48:53 AM:       - SANITY_DATASET
9:48:53 AM:       - SANITY_PROJECT_ID
9:48:53 AM:       - SANITY_TOKEN
9:48:53 AM:     publish: /opt/build/repo/dist
9:48:53 AM:     publishOrigin: config
9:48:53 AM:   functionsDirectory: /opt/build/repo/functions
9:48:53 AM:   headers:
9:48:53 AM:     - for: /*
      values:
        X-Robots-Tag: index, follow
  headersOrigin: config
  plugins:
    - inputs: {}
      origin: ui
      package: '@netlify/plugin-lighthouse'
9:48:53 AM: Build failed due to a user error: Build script returned non-zero exit code: 2
9:48:54 AM: Failed during stage 'building site': Build script returned non-zero exit code: 2 (https://ntl.fyi/exit-code-2)
9:48:54 AM: Failing build: Failed to build site
9:48:54 AM: Finished processing build request in 1m6.897s

thanks for the help in advance!

The Support Guide for memory issues is located here:

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