Update Dockerfile

upgrade to 0.31.6 (solidnerd#227)

Co-authored-by: JHenneberg <[email protected]>

chore(deps): update mysql docker tag to v5.7.33 (solidnerd#225)

Co-authored-by: Renovate Bot <[email protected]>

upgrade to 0.31.3 (solidnerd#223)

Co-authored-by: solidnerd <[email protected]>

upgrade to 0.30.7 (solidnerd#222)

feat: upgrade bookstack to 0.30.4 (solidnerd#217)

fix: set composer version to 1.10.16 (solidnerd#215)