Today I would give my original Banana Pi (A20 / 1GB Ram) a new life/work and installed for testing armbian Bionic dev with kernel 4.17 (for not trashing my normal Pihole -  a OPi PC2 with armbian stretch)   After installing armbian bionic I did try to install Pihole via curl -sSL | bash but it "crashes" while starting dnsmaq - because it seems to collide with resolved at Port 53 see as reference :