!! Set a default font and font size as below:
*.font: FiraCode Nerd Font:size=14
*.symbols: FiraCode nerd Font:size=14

/* dwm config */
dwm.borderpx: 2
dwm.gappx: 15

/* st config */
st.font: FiraCode Nerd Font:size=14
st.symbols: FiraCode Nerd Font:size=14
st.termname: st-256color
st.borderpx: 5