A proxy is needed to solve CORS problems when contacting the backend — A proxy is needed to solve CORS problems when contacting the backend Frontend and backend normally run on different domains causing CORS problems, so you normally need to have the backend responding under a subpath (/api) under the same domain where the FE is served. Webpack or Nginx ? You can solve that via webpack proxy, but you can also us the more advanced nginx that…

IntelliJ JUnit test config to use ENV vars and override hibernate logging — Override of application properties from ENV vars Spring supports override of application properties from environment variables. As explained in the related section (v2.4.5), …

Postgres allows to run recursive queries, by using a special syntax that allows to build the final resulting rows by referring to the… — Postgres allows to run recursive queries, by using a special syntax that allows to name the final data set and recursively refer to it via Common Table Expressions. When do you need them ? In case you are storing hierarchical data (e.g. a tree) in a relational format (e.g. where…

Spring Boot app built (integration tests with testcontainers) and images taged and pushed at every commit — Spring Boot app built (integration tests with testcontainers) and images taged and pushed at every commit Root gitlab-ci.yml Place a .gitlab-ci.yml into the repository, define the stages (just names you came up with, you’ll see later what they mean) and include the specific files for each subproject to build for…

I’ll explain below in the detail how to create containers (via Dockerfile) for a React and also a Spring Boot application with Postgres (or… — I’ll explain below in the detail how to create containers (via Dockerfile) for a React and also a Spring Boot application with Postgres (or MySQL). One does not require the other, so you can use this guide to build either one. I’ll also present a docker-compose file useful (but not…

How to use two accounts (and related SSH , each one with its one repository — How to configure each repository to use a different key belonging to a different gitlab or github account. Gitlab and Github don’t let you add the same key to different accounts. …

Git basics on local and remote, log ranges to compare, and bash script to update via rebasing — How git push and pull work (skip if you already know) The git command git pull (well explained here) is basically the composition of git fetch (to get the data from the remote repository) followed by a git merge. Once you run it, the command will run the fetch (network operation taking some time), and — if there are no incoming…