added commands to free up space before building as per https://github.com/actions/runner-images/issues/2840#issuecomment-1540506686

.github/workflows/build_ubuntu.yml

@@ -48,7 +48,55 @@ jobs:
 
     runs-on: ubuntu-latest
 
+    # free disk space ref: https://github.com/actions/runner-images/issues/2840#issuecomment-1540506686
     steps:
+      - name: Check disk space
+        run: df -h
+      - name: Free disk space
+        run: |
+          sudo docker rmi $(docker image ls -aq) || true
+          sudo swapoff /swapfile || true
+          sudo rm -rf /swapfile /usr/share/dotnet /usr/local/lib/android /opt/ghc  || true
+          sudo apt purge aria2 ansible azure-cli shellcheck rpm xorriso zsync \
+            clang-6.0 lldb-6.0 lld-6.0 clang-format-6.0 clang-8 lldb-8 lld-8 clang-format-8 \
+            clang-9 lldb-9 lld-9 clangd-9 clang-format-9 dotnet-sdk-3.0 dotnet-sdk-3.1=3.1.101-1 \
+            esl-erlang firefox g++-8 g++-9 gfortran-8 gfortran-9 google-chrome-stable \
+            google-cloud-sdk ghc-8.0.2 ghc-8.2.2 ghc-8.4.4 ghc-8.6.2 ghc-8.6.3 ghc-8.6.4 \
+            ghc-8.6.5 ghc-8.8.1 ghc-8.8.2 ghc-8.8.3 ghc-8.10.1 cabal-install-2.0 cabal-install-2.2 \
+            cabal-install-2.4 cabal-install-3.0 cabal-install-3.2 heroku imagemagick \
+            libmagickcore-dev libmagickwand-dev libmagic-dev ant ant-optional kubectl \
+            mercurial apt-transport-https mono-complete mysql-client libmysqlclient-dev \
+            mysql-server mssql-tools unixodbc-dev yarn bazel chrpath libssl-dev libxft-dev \
+            libfreetype6 libfreetype6-dev libfontconfig1 libfontconfig1-dev php7.1 php7.1-bcmath \
+            php7.1-bz2 php7.1-cgi php7.1-cli php7.1-common php7.1-curl php7.1-dba php7.1-dev \
+            php7.1-enchant php7.1-fpm php7.1-gd php7.1-gmp php7.1-imap php7.1-interbase php7.1-intl \
+            php7.1-json php7.1-ldap php7.1-mbstring php7.1-mcrypt php7.1-mysql php7.1-odbc \
+            php7.1-opcache php7.1-pgsql php7.1-phpdbg php7.1-pspell php7.1-readline php7.1-recode \
+            php7.1-snmp php7.1-soap php7.1-sqlite3 php7.1-sybase php7.1-tidy php7.1-xml \
+            php7.1-xmlrpc php7.1-xsl php7.1-zip php7.2 php7.2-bcmath php7.2-bz2 php7.2-cgi \
+            php7.2-cli php7.2-common php7.2-curl php7.2-dba php7.2-dev php7.2-enchant php7.2-fpm \
+            php7.2-gd php7.2-gmp php7.2-imap php7.2-interbase php7.2-intl php7.2-json php7.2-ldap \
+            php7.2-mbstring php7.2-mysql php7.2-odbc php7.2-opcache php7.2-pgsql php7.2-phpdbg \
+            php7.2-pspell php7.2-readline php7.2-recode php7.2-snmp php7.2-soap php7.2-sqlite3 \
+            php7.2-sybase php7.2-tidy php7.2-xml php7.2-xmlrpc php7.2-xsl php7.2-zip php7.3 \
+            php7.3-bcmath php7.3-bz2 php7.3-cgi php7.3-cli php7.3-common php7.3-curl php7.3-dba \
+            php7.3-dev php7.3-enchant php7.3-fpm php7.3-gd php7.3-gmp php7.3-imap php7.3-interbase \
+            php7.3-intl php7.3-json php7.3-ldap php7.3-mbstring php7.3-mysql php7.3-odbc \
+            php7.3-opcache php7.3-pgsql php7.3-phpdbg php7.3-pspell php7.3-readline php7.3-recode \
+            php7.3-snmp php7.3-soap php7.3-sqlite3 php7.3-sybase php7.3-tidy php7.3-xml \
+            php7.3-xmlrpc php7.3-xsl php7.3-zip php7.4 php7.4-bcmath php7.4-bz2 php7.4-cgi \
+            php7.4-cli php7.4-common php7.4-curl php7.4-dba php7.4-dev php7.4-enchant php7.4-fpm \
+            php7.4-gd php7.4-gmp php7.4-imap php7.4-interbase php7.4-intl php7.4-json php7.4-ldap \
+            php7.4-mbstring php7.4-mysql php7.4-odbc php7.4-opcache php7.4-pgsql php7.4-phpdbg \
+            php7.4-pspell php7.4-readline php7.4-snmp php7.4-soap php7.4-sqlite3 php7.4-sybase \
+            php7.4-tidy php7.4-xml php7.4-xmlrpc php7.4-xsl php7.4-zip php-amqp php-apcu \
+            php-igbinary php-memcache php-memcached php-mongodb php-redis php-xdebug \
+            php-zmq snmp pollinate libpq-dev postgresql-client powershell ruby-full \
+            sphinxsearch subversion mongodb-org -yq >/dev/null 2>&1 || true
+          sudo apt-get autoremove -y >/dev/null 2>&1 || true
+          sudo apt-get autoclean -y >/dev/null 2>&1 || true
+      - name: Check disk space
+        run: df -h
       - uses: actions/checkout@v3
       - name: Install podman
         run: |