chore(ci): upgrade database and erlang runtime on pipelines (#74)

The following upgrades were made:

* Bump [`postgres` from 16.0 to 16.3][postgres-release].
* Bump [`erlang`][erlang-release] from [26.2.3 to 26.2.5][erlang-diffs].

Also, use the same `elixir` image/tag on both pipelines.

[postgres-release]: https://www.postgresql.org/docs/release/16.3/
[erlang-release]: https://www.erlang.org/patches/otp-26.2.5
[erlang-diffs]: https://github.com/erlang/otp/compare/OTP-26.2.3...OTP-26.2.5

Reviewed-on: #74
Co-authored-by: Joao P Dubas <joao.dubas+gitea@gmail.com>
Co-committed-by: Joao P Dubas <joao.dubas+gitea@gmail.com>

.drone.yml

@@ -9,7 +9,7 @@ trigger:
 
 steps:
   - name: database healthcheck
-    image: &postgres 'postgres:16.0-alpine'
+    image: &postgres 'postgres:16.3-alpine'
     environment:
       PGUSER: postgres
       PGPASSWORD: postgres
@@ -37,12 +37,12 @@ steps:
       restore: true
 
   - name: test
-    image: &elixir 'hexpm/elixir:1.16.2-erlang-26.2.3-debian-bookworm-20240130-slim'
+    image: 'hexpm/elixir:1.16.2-erlang-26.2.5-debian-bookworm-20240513-slim'
     environment:
       MIX_ENV: test
-      POSTGRES_HOST: db
+      POSTGRES_HOST: &db_host db
-      POSTGRES_USER: postgres
+      POSTGRES_USER: &db_user postgres
-      POSTGRES_PASS: postgres
+      POSTGRES_PASS: &db_pass postgres
     commands:
       - mix do local.rebar --force, local.hex --force, deps.get, deps.compile
       - mix compile
@@ -69,11 +69,11 @@ steps:
       region: us-east-1
 
 services:
-  - name: db
+  - name: *db_host
     image: *postgres
     environment:
-      POSTGRES_USER: postgres
+      POSTGRES_USER: *db_user
-      POSTGRES_PASSWORD: postgres
+      POSTGRES_PASSWORD: *db_pass
 
 ---
 kind: pipeline
@@ -105,7 +105,7 @@ steps:
       restore: true
 
   - name: compile app
-    image: &elixir 'elixir:1.15.7-slim'
+    image: &elixir 'hexpm/elixir:1.16.2-erlang-26.2.5-debian-bookworm-20240513-slim'
     commands:
       - mix do local.rebar --force, local.hex --force, deps.get, deps.compile
       - mix compile --all-warnings --warnings-as-errors