delete additional nginx repo

as default ppa repository for ubuntu jammy provides
suitable version of nginx ( >= 1.12.1)

Dockerfile

@@ -33,8 +33,6 @@ RUN apt-get update \
 RUN set -ex && \
     apt-key adv --keyserver hkp://keyserver.ubuntu.com:80 --recv E1DD270288B4E6030699E45FA1715D88E1DF1F24 \
  && echo "deb https://ppa.launchpadcontent.net/git-core/ppa/ubuntu jammy main" >> /etc/apt/sources.list \
- && apt-key adv --keyserver hkp://keyserver.ubuntu.com:80 --recv ABF5BD827BD9BF62 \
- && echo "deb http://nginx.org/packages/ubuntu/ jammy nginx" >> /etc/apt/sources.list \
  && wget --quiet -O - https://www.postgresql.org/media/keys/ACCC4CF8.asc | apt-key add - \
  && echo 'deb http://apt.postgresql.org/pub/repos/apt/ jammy-pgdg main' > /etc/apt/sources.list.d/pgdg.list \
  && wget --quiet -O - https://deb.nodesource.com/gpgkey/nodesource-repo.gpg.key | apt-key add - \